The principle of operation of a heat gun, regardless of the price, complexity of the device or any classification, is quite simple and, in fact, is the same, both for diesel or gas, and for electric guns.
A powerful fan drives cold air through heating elements or a combustion chamber, in which the air heats up and the same fan contributes to an even distribution of hot air throughout the room or open space.
The most common in use at the moment are three types of heat guns: electric, gas and diesel. Diesel, in turn, are divided into direct and indirect heating units.
In the first case (direct heating), the combustion products together with the incoming air are the heat carrier. Such guns are used either in open areas or in rooms with a good supply and exhaust ventilation system. Indirect heating devices are designed in such a way that the combustion products do not enter the room, but are discharged outside of it. Both diesel and gas cannons require a mains connection to power the fan, ignition system or security system.
According to the principle of fuel injection, ejector and electromechanical cannons are distinguished. The ejector principle is implemented as follows: the air flow created by the pump creates a vacuum and sucks fuel from the tank. Further, the air-fuel mixture is fed through the nozzle into the combustion chamber. Electromechanical injection is carried out by installing a fuel pump and an air blower.
Operating principle
Such guns are often called fan heaters due to the similarity of the principle of operation, but they have certain differences. They work in the same way as other similar products: air flows around the combustion chamber with a fan and heats the room.
The principle of operation of the heat gun
The design of modern guns includes a special sensor that turns off the device when the set temperature is reached, thus achieving significant fuel savings. Garage craftsmen make guns that can run on different grades of used oil.
Factory-made or home-made, heaters have several very vulnerable spots, so they need frequent repairs. This is cleaning nozzles and filters, replacing the fan and much more. To find out all the vulnerabilities, you need to study the design of such guns.
Important advice! After using the gun and setting it for long-term storage, the remaining fuel must be drained, and the tank must be thoroughly rinsed from the remaining diesel fuel. It is unsafe for the product to use fuels that have been stored for a long time.
Repair of a heat gas gun
Heaters of this kind are equipped with special burners. It is in them that the reason often lies. For example, if the mixture of gas and oxygen does not ignite, then most likely the matter is in the nozzles. They must be removed, blown out with compressed air or rinsed under pressure, and then reinserted. The absence of a spark indicates a faulty piezo ignition. In this case, it is necessary to clean the contacts or simply replace the piezo. If the matter lies in the malfunction of the circuit breakers, then they can be removed from the structure altogether, but in this case the unit will be turned off manually. I would like to note that old heat guns are repaired a little easier than new models. This is due to the lack of a large number of electronic components.For example, if Master heat guns are being repaired, special equipment will be needed to check electrical circuits.
Product design
Products with an indirect method of space heating have chimneys through which all combustion products are removed, therefore, in practice, they can be used to heat residential premises. They are much safer, but they use oxygen for combustion, so ventilation or periodic ventilation is needed. Their power is lower because losses occur through the exhaust system.
Diesel heat gun device
With a direct heating product, all combustion products remain in the room, therefore they cannot be used where people constantly live. They are used to heat construction sites and warehouses where there is a natural flow of air, because lack of ventilation can lead to carbon monoxide poisoning.
All products are equipped with a powerful metal body: it excludes the ingress of foreign objects that can cause damage or become a source of fire. A fuse must be installed that turns off the device when the case is very hot.
For circulation, a compressor or a small pump is used, for pumping into the room - a fan, which experts consider one of the vulnerable points of these products. A burner and a fuel supply pipeline are located inside the housing.
The main elements of a diesel heat gun:
- there is an exhaust pipe for removing smoke;
- a fuel tank located at the bottom of the product;
- pump or compressor driven by an electric motor.
Features of the electrical circuit
Among the many modifications, the electrical circuit of the heat gun is widely popular. The entire electrical part fits inside the enclosure. There are also heating elements with ribs to improve heat transfer.
In the general diagram, all controls are located at the rear of the case. With their help, the temperature is controlled, switching from one mode to another. Special devices give light and sound signals when the device is connected to the network.
When choosing an electric heat gun, it is necessary to determine as accurately as possible the volume of space and the overall dimensions of the room that is supposed to be heated. The reliable and safe operation of the device will depend on this.
Possible problems
As a result of continuous and prolonged operation, the equipment can have a number of problems. Most often this is not due to the wear of some individual parts, but to mediocre service. Let's analyze common malfunctions of diesel heat guns.
Intermittent fuel supply
The problem may arise due to accumulated dirt in the hoses of the system: development from fuel, oil, foreign objects, etc. This also includes a dirty tank. The malfunction is eliminated quite simply: we drain the fuel, disconnect the hoses and thoroughly rinse all the elements responsible for the fuel supply.
Fuel is non-flammable
First of all, it is worth checking the spark plugs: replace faulty ones, and dry them filled with fuel. It will also be useful to correct the gap between the electrodes if it has increased or, conversely, decreased.
The gun stalls periodically
The air filter is most likely clogged. Considering the type of fuel, it is useless to clean it. It is much more efficient to buy a new one.
Diesel Cannon Air Filter
Sometimes it's all about the quality of fuel: diesel fuel is different. Therefore, it makes sense to try to fill in fuel purchased at a gas station of another brand.
Too low temperature in the heat exchanger
If the flame in the combustion chamber does not burn intensively enough, the cannon starts to idle.We have to set the maximum level of fuel supply, whereas previously there was enough heat at average or even minimum values.
Most likely, the nozzle is clogged. The element is easily cleaned mechanically. Purge by means of a compressor is ideal.
The gun is overheating
In a good half of the cases, the thermostat is to blame. We remove the part, process it from dirt and clean the contacts. In more advanced models, it cannot be repaired due to additional awnings - only replacement.
Gas heat extinguishers
Most often, the following structural elements can fail in a gas heat gun:
- blower fan;
- piezoelectric element for gas ignition;
- control and protective units;
- fuel supply device.
Therefore, below we will indicate what malfunctions may arise in the operation of gas heating units, as well as how they can be eliminated with our own hands:
- Gas does not ignite. In this situation, as a rule, the piezoelectric element has failed. It is recommended to clean the igniter and set the gap between the electrodes. And if the problem is not solved, then it is necessary to completely replace the piezoelectric element.
- Gas is connected to the heat gun, but does not enter the combustion chamber. The cause of this fault is a clogged burner. It is recommended to clean this element with a compressor, in other words, you need to blow through the burner with a powerful jet of air.
- There is an unpleasant smell of carbon monoxide. As a rule, the appearance of this malfunction is due to the fact that a leak has appeared in the gas hoses. Therefore, in order to eliminate this defect, it is necessary to tighten the fastening clamps or cut off the ends of the hose. If this procedure does not help, then these main hoses must be replaced.
You can read an overview of suitable heat guns for a garage in this article.
Heat gun maintenance
Diesel cannon of indirect heating
All preventive work on the equipment is reduced to setting up and processing the air intake system, compressor and fuel pump. The procedure for each individual heat gun is roughly the same. Let's look at the details of maintenance using the example of a classic model with indirect heating and automatic flame control.
The design of a diesel heat gun cannot be called complex. The fuel is supplied by the pump to the nozzle, after which it is produced in the combustion chamber. The burner is ignited using a pair of electrodes. The fan expels the flow through the chamber during operation. Indirect heating assumes the presence of an independent circuit, as a result of which the combustion products practically do not come into contact with the heated air.
Equipment preventive maintenance:
- Remove the cover and clean the fan from dirt.
- Disconnect the high-voltage wires from the combustion chamber and remove the fuel hose. We blow out the last one.
- We loosen the fasteners on the camera and remove the block. We clean it from soot.
- We unscrew the nuts at the end of the chamber and get access to the nozzle. We blow it out.
- Putting it all in the reverse order.
DIESEL HEAT GUNS
Diesel cannon does not light up. What to do?
The fastest way to figure out what's the matter
Your diesel cannon direct heating faithfully worked for a long time and suddenly began to burn badly, or diesel cannon won't start... To produce diesel cannon repair and to buy spare parts for a diesel gun I want to understand what happened. There is a proven, very simple way to understand why diesel gun does not work.
Detailed instructions:
1. Open the top cover of the diesel cannon:
Fire up the diesel cannon with an open top casing. If the cannon starts working with the cover open, then the air filters in the cannon are too dirty. The air filters should be replaced (picture below) and the repair of the gun will be completed.
If you do not have air filters at hand, and the gun must certainly work now, you can work with an "open casing", and at the first opportunity, buy and replace a set of air filters:
2. If diesel cannon does not work and with the cover open, the fault diagnosis becomes somewhat more difficult: Turn off the power supply to the diesel gun and try to push the fan impeller slightly. If the impeller, having made 1-2 turns, stops, everything is fine, the air pump is working properly. If the impeller rotates freely, without jamming by inertia for a sufficiently long time, the graphite disk of the air pump is destroyed in the gun. If the air pump is not destroyed but diesel cannon still does not light up, then observe through the nozzle block window:
1. Check if there is an electrical spark on the arrester. If not, replace the arrester (1 figure below) or the high-voltage unit. (2 picture below):
2. How the fuel mixture is sprayed from the injector. The spray cone must be intense and cover the arrester, otherwise ignition will not occur. If the cone is not intense enough, there is a "suction" of air in the gun or the fuel injector is clogged. The fuel injector clogs up much less frequently than unwanted air leaks. Let's start with him. Finding unwanted air leaks will be more difficult. First, check the plastic housing of the filters:
There should not be even the slightest cracks. Next, check the tightness of the fuel and air hoses and fittings. If everything is in order - check the operation of the condition of the air pump in the following way. Open the back cover of the air pump. Inspect the bladed graphite rotor and rear cover surface. The rotor must be dry and free from deep scratches. The lid should also not have deep scratches and wear:
Diesel cannon device quite simple and we are sure that if you carry out diagnostics using the procedures described above, you will definitely find a malfunction. Purchase spare parts for diesel guns You can visit our website or our partners in your city.
spare parts for diesel guns
heat guns
Safety measures when using guns
To ensure fire safety measures, a container with a fuel supply for the product must be located at a distance of 8 meters from heating devices or any sources of open flame.
Remember! Instead of diesel fuel, you cannot use gasoline of any brand: the likelihood of an explosion increases many times over, because it is more volatile.
Safety measures when using guns are quite simple - you must immediately leave the room if you feel:
- sudden and severe dryness in the mouth;
- pain in the throat, nose, or eye area;
- sudden attacks of headache;
- desires of nausea.
Many people react very painfully to carbon monoxide indoors: for example, people with lung diseases or cardiac patients with anemia, pregnant women. They are contraindicated to be located where a diesel heat gun with direct heating is used.
Service center for the repair of diesel guns
How to warm the air in a cold room? There are a lot of ways, but the use of diesel heat guns (air heaters) is especially comfortable. This is a professional equipment, it is distinguished by its economy and good efficiency. The well-thought-out design of diesel heat guns allows you to create a comfortable temperature and constantly maintain it at a given level.
These are truly irreplaceable devices, without which it is difficult to imagine a comfortable life. Actually, like any other equipment, diesel heat guns have one unpleasant property - they fail over time. It is at this moment that our company appears.We are ready to offer professional assistance in the repair and diagnostics of diesel heat guns as soon as possible.
Complex repairs - free delivery
If the repair of the gun (air heater) is objectively difficult and presumably will take a lot of time, our employees are ready to carry out free delivery to the service center. You will be able to pick up the equipment immediately after replacing the necessary parts. If you wish, we can deliver the repaired heat guns to your address.
Additional options for cooperation
Repair of a diesel cannon (air heater) is just one of the directions of our activity. We sell original spare parts, our service provides an opportunity to undergo a complete MOT. The reverent attitude to the quality of work is the merit of our specialists, who regularly undergo additional training.
Remember that contacting our company in a timely manner helps to save money in the future. If you run into a problem, repairs will be much more expensive. To place an order, please call!
About fan replacement
Now we have figured out a little about what a heat gun is. A repairman for such equipment can be performed for a relatively small amount of money, but in most cases this is a feasible task for everyone. Most often you have to deal with a fan, since this element is most exposed to intense wear. Since in most cases we will deal with burnout of wires and their oxidation, repair is possible, but such a malfunction as mechanical damage or critical wear requires replacing the electric motor. In this case, it makes absolutely no sense to carry out repairs. Diesel heat gun "Kraton" or any other cannon is equipped with low-power fans. They must be selected based on the performance of the equipment. In any case, there are no special requirements, you can even use a small household fan, if, of course, you can fit it into the case.
